china japan and south korea. governor is confident more deals can be signed while there. in sacramento, abc 7 news. >>> new report questions whether noise levels on bart trains can be harmful to the hearing. san francisco chronicle survey the entire bart system and found decibel levels as high as 100 which is the equivalent of a jack hammer. bart admits it is noisey in spots but adds recent study gaivt agency a top rating among comparable rail systems across the country. >> there are times when the noise is pretty loud. p perhaps a yack hammer or something else of 85 decibel but the noise doesn't stay for that level of time for a long time. so while jack hammer can go on for hours and hours, hours, this is pretty much 20 or 30 seconds stretch. >> according to the chronicle the highest noise level between west oakland and embarcadero station in the transbay tube of course. 24th to 16th and mission street and linda to rock ridge. quietest right from hayward to the south hayward station. >> in education news. first in california. charter school in san francisco will combine